Factorise : 3x² + 5a - 2 – InterviewSolution

1.	Factorise : 3x² + 5a - 2
Answer» ONG>Step-by-step explanation: Method 1 (By cross method) 3x2+5x+2 =(3x+2)(x+1) Method 2 (By GROUPING) 3x2+5x+2 =3x2+3x+2x+2 =3x(x+1)+2(x+1) =(3x+2)(x+1) Method 3 (By quadratic formula) By quadratic formula, x=−5±(−5)2–4(3)(2)√2(3)=−1 or −23Therefore 3x2+5x+2=3(x+23)(x+1)=(3x+2)(x+1).

Factorise : 3x² + 5a - 2

Answer» ONG>Step-by-step explanation:

Method 1 (By cross method)

3x2+5x+2

=(3x+2)(x+1)

Method 2 (By GROUPING)

3x2+5x+2

=3x2+3x+2x+2

=3x(x+1)+2(x+1)

=(3x+2)(x+1)

Method 3 (By quadratic formula)

By quadratic formula,

x=−5±(−5)2–4(3)(2)√2(3)=−1 or −23Therefore 3x2+5x+2=3(x+23)(x+1)=(3x+2)(x+1).

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Factorise : 3x² + 5a - 2​

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Factorise : 3x² + 5a - 2